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Lec34_35_PollinationA_05D

Lec34_35_PollinationA_05D - Insects and Pollination A...

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Insects and Pollination A V Emphasis on agricultural crops Important Topics What pollination is and the various means by which plants become pollinated, particularly by insects How insects and plants are co- adapted and depend upon each other The importance of insect pollination for many common plants Problems and threats to commercial pollination V Pollination The process whereby pollen is transferred from the male part of a flower (anther) to the female part (stigma) Self-pollination: occurs between sexual parts of the same flower or different flowers on the same plant Cross-pollination: occurs between flowers on different plants Promotes genetic diversity and probability that unfavorable traits are recessive H
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Pollen contains male genetic material which must find its way to the ovary. Pollen released from anthers Placed on the stigma Pollen transfered to female part of flower Fertilization via pollen tube into ovary Ovule -> seed Ovary -> fruit H Pollen
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